Normalcdf, Invnorm – Texas Instruments TI-83 PLUS User Manual

Page 429

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TI-83 Plus

Inferential Statistics and Distributions

426

normalcdf(

normalcdf(

computes the normal distribution probability between

lowerbound

and

upperbound

for the specified mean

m

and standard

deviation

s

. The defaults are

m

=0 and

s

=1.

normalcdf(

lowerbound

,

upperbound

[

,

m

,

s

]

)

invNorm(

invNorm(

computes the inverse cumulative normal distribution function

for a given

area

under the normal distribution curve specified by mean

m

and standard deviation

s

. It calculates the

x

value associated with an

area

to the left of the

x

value. 0



area



1 must be true. The defaults are

m

=0

and

s

=1.

invNorm(

area

[

,

m

,

s

]

)

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